I overheard that indian music disputes the notion that 7 notes are equally divided. Hence, people should use tanpura (instead of harmonium or piano) to practice with. I googled about it, and I read that it only plays Pa Sa Sa Sa (or something like that). Can anybody shed light on the topic? Does anybody know some online tanpura that can play all 7 notes? (else how is one supposed to practice?)
See here to play a virtual live tampura and to read more about it.
As you'll find in text:
Also you'll find it helpful to read about quarter tone which is a basic component of many countries' traditional music in Middle-east and Central Asia. As you may know even having smaller note divisions in music of some countries is common.
You can watch a man playing quarter tones here.